150 CHIRONOMID^E. 



Corpus elongatum, mediocre, aut parvura, aut minimum, srepissiine 

 pubescens. Caput parvum, sessile. Oculi reniformes, remoti. Pro- 

 boscis brevis. Palpi 4-articulati, incurvi, subcylindrici ; articulus 

 primus brevissimus ; secundus et tertius aequales ; quartus longior et 

 gracilior. Antennae porrectse, filiforrnes. Thorax ovatus aut longi- 

 ovatus, antice plus minusve productus. Scutellum mediocre. Aloe 

 angustae, elongatse, lanceolatse, deflexse. Abdomen segmentis 8, gra- 

 cile. Pedes autici plus minusve elongati. Mas. Antenna? plumosae, 

 1 3-articulata3. Fcem. Antenna3 verticillato-pilosse, 6-articulata3. 

 Body of moderate size, or small, or very minute. Eyes reniform, 

 broader beneath, separate in both sexes. Mouth not elongated. Palpi 

 four-jointed, prominent, curved, pubescent, nearly cylindrical ; first 

 joint very short ; second and third of moderate and equal length ; 

 fourth a little longer and more slender. Antennae porrect, filiform, 

 seated in a notch of the eye. Thorax oval or elongate-oval, higher 

 than the head, more or less protuberant in front, very generally with 

 three dark stripes. Scutellum of moderate size. Wings narrow, elon- 

 gate, lanceolate, deflexed, slightly ciliated along the hind border, gene- 

 rally bare, pubescent in some species ; mediastinal vein more than half 

 the length of the wing, not extending to the border ; subcostal ending 

 at nearly three-fourths of the length ; radial emerging from the prre- 

 brachial transverse veinlet, ending at beyond three-fourths of the length ; 

 cubital proceeding from the prsebrachial transverse veinlet, ending at 

 very little in front of the tip ; subapical ending at very little behind 

 the tip; subaual forming a fork of the praebrachial ; anal complete; 

 subaxillary obsolete. Areolets eleven, the humeral, the subcostal, the 

 mediastinal, the radial, the cubital, the pra3brachial, the pobrachial, 

 which is not closed as in Tanypus, the subapical, one externo-medial, 

 the anal, and the axillary. Posterior margin much excavated, and 

 forming an acute angle at its base. Abdomen with eight segments, 

 slender, more or less exceeding twice the length of the thorax. Legs 

 more or less long and slender, bare or slightly pilose, unarmed ; coxaj 

 of moderate size ; ungues and onychia very small. Fore legs remote 

 from the others, porrect, their tarsi more or less elongated. 



Male. Antennae thirteen-jointed, as long as the thorax, thickly plu- 

 mose, the hairs decreasing in length towards the tips ; first joint short, 

 cylindrical ; second and following joints to the twelfth globose, ex- 

 tremely short ; thirteenth filiform, slender, generally as long as the 

 whole of the preceding joints. Wings a little shorter than the abdo- 

 men. Abdomen slender, somewhat attenuated ; seventh segment flat- 

 tened, slightly dilated hindward, emarginate at the tip ; eighth smaller, 

 oval, depressed, with four little apical appendages, which are curved, 

 somewhat hairy, falcate or nearly filiform ; fore tarsi often hairy. Fern. 

 Antennae six-jointed, about half the length of the thorax ; second, third, 

 fourth, and fifth oblong or elongate-pyriform, slightly verticillate-pilose ; 

 sixth slender, filiform, as long as the fourth and the fifth. Wings as 

 long as the abdomen. Abdomen comparatively short and thick, sub- 

 lanceolate or nearlv cylindrical. 



